reimplement github action in typescript

src/run.ts

@@ -0,0 +1,97 @@
+import * as core from "@actions/core"
+import { exec } from "child_process"
+import { promisify } from "util"
+
+import { restoreCache, saveCache } from "./cache"
+import { installGo, installLint } from "./install"
+import { findLintVersion } from "./version"
+
+const execShellCommand = promisify(exec)
+
+async function prepareLint(): Promise<string> {
+  const lintVersion = await findLintVersion()
+  return await installLint(lintVersion)
+}
+
+async function prepareEnv(): Promise<string> {
+  const startedAt = Date.now()
+
+  // Prepare cache, lint and go in parallel.
+  const restoreCachePromise = restoreCache()
+  const prepareLintPromise = prepareLint()
+  const installGoPromise = installGo()
+
+  const lintPath = await prepareLintPromise
+  await installGoPromise
+  await restoreCachePromise
+
+  core.info(`Prepared env in ${Date.now() - startedAt}ms`)
+  return lintPath
+}
+
+type ExecRes = {
+  stdout: string
+  stderr: string
+}
+
+const printOutput = (res: ExecRes): void => {
+  if (res.stdout) {
+    core.info(res.stdout)
+  }
+  if (res.stderr) {
+    core.info(res.stderr)
+  }
+}
+
+async function runLint(lintPath: string): Promise<void> {
+  const debug = core.getInput(`debug`)
+  if (debug.split(`,`).includes(`cache`)) {
+    const res = await execShellCommand(`${lintPath} cache status`)
+    printOutput(res)
+  }
+
+  const args = core.getInput(`args`)
+  if (args.includes(`-out-format`)) {
+    throw new Error(`please, don't change out-format for golangci-lint: it can be broken in a future`)
+  }
+
+  const cmd = `${lintPath} run ${args}`.trimRight()
+  core.info(`Running [${cmd}] ...`)
+  const startedAt = Date.now()
+  try {
+    const res = await execShellCommand(cmd)
+    printOutput(res)
+    core.info(`golangci-lint found no issues`)
+  } catch (exc) {
+    // This logging passes issues to GitHub annotations but comments can be more convenient for some users.
+    // TODO: support reviewdog or leaving comments by GitHub API.
+    printOutput(exc)
+
+    if (exc.code === 1) {
+      core.setFailed(`issues found`)
+    } else {
+      core.setFailed(`golangci-lint exit with code ${exc.code}`)
+    }
+  }
+
+  core.info(`Ran golangci-lint in ${Date.now() - startedAt}ms`)
+}
+
+export async function run(): Promise<void> {
+  try {
+    const lintPath = await core.group(`prepare environment`, prepareEnv)
+    await core.group(`run golangci-lint`, () => runLint(lintPath))
+  } catch (error) {
+    core.error(`Failed to run: ${error}, ${error.stack}`)
+    core.setFailed(error.message)
+  }
+}
+
+export async function postRun(): Promise<void> {
+  try {
+    await saveCache()
+  } catch (error) {
+    core.error(`Failed to post-run: ${error}, ${error.stack}`)
+    core.setFailed(error.message)
+  }
+}